Steel Beam Sizes / UK / Universal Beams / UB 305×102×33

UB 305×102×33 Steel Beam Dimensions and Properties

UK Universal beams · v2023.11

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Diagram, properties emphasis, and nearby alternatives use the selected unit system.

Units

Section diagram

UB 305×102×33 dimensions

Not to scale. Dimensions shown for reference.

Section properties

Symbols match the steel section finder. Imperial and metric values are shown side by side.

Property Imperial Metric
Weight 22.04 lb/ft 32.80 kg/m
Depth, d 12.31 in 312.70 mm
Flange width, bf 4.03 in 102.40 mm
tw 0.260 in 6.600 mm
tf 0.425 in 10.800 mm
Area 6.48 in² 4,180.00 mm²
Ix 156.16 in⁴ 65,000,000 mm⁴
Iy 4.66 in⁴ 1,940,000 mm⁴
Sx 25.39 in³ 416,000.00 mm³
Sy 2.32 in³ 38,000.00 mm³
Zx 29.35 in³ 481,000.00 mm³
Zy 3.66 in³ 60,000.00 mm³
rx 4.92 in 125.00 mm
ry 0.85 in 21.50 mm
J 0.29 in⁴ 122,000.00 mm⁴
Cw 163.85 in⁶ 44,000,000,000 mm⁶

Alternatives

Useful nearby sections

Same-series weight neighbors, closest Ix, and a nearby depth series when available — with percent change versus UB 305×102×33.

Lighter in Universal beams

UB 254×146×31

Weight
31.1 kg/m (-5.2%)
Depth
251.4 mm (-20%)
Ix
44,100,000 mm⁴ (-32%)

Heavier in Universal beams

UB 356×127×33

Weight
33.1 kg/m (+0.9%)
Depth
349.0 mm (+12%)
Ix
82,500,000 mm⁴ (+27%)

Closest Iₓ in Universal beams

UB 254×146×43

Weight
43.0 kg/m (+31%)
Depth
259.6 mm (-17%)
Ix
65,400,000 mm⁴ (+0.6%)
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Source: British-Sections-1 and Eurocode 3 UK shared angle/hollow tables · v2023.11 · Methodology